#fb-container {
    width: 100%; 
    max-width: 500px;
}

  /* Tablet */
 @media (min-width: 768px) {
    #fb-container {
        max-width: 300px; 
    }
 }

 /* Laptop */
 @media (min-width: 1024px) {
    #fb-container { 
        max-width: 400px; 
    }
 }

 /* Desktop */
@media (min-width: 1440px) {
    #fb-container { 
        max-width: 400px; 
    }
}